So I uploaded a photo with a drawing covered for everyone except my patrons, plus the HINT of the real drawing and they told me it's a "censorship" and against the rules. NO... I did not censored the photo in it's regular meaning. I just hinted my full image, so anyone that is interestet can visit my Patreon. I do not see the problem in that type of advertising. And I do not think it VIOLATES any rule here.
Here's what I got -

ID: #570538
Date: January 28, 2018
Rejection notice: Just the top image would be fine. Excessive censorship, such as cropping or watermarking as a means to advertise; troll; mask a commission; or otherwise hide elements of a picture beyond what is required by law (ie: Japanese artists), is against our quality standards. Please remove such obstructions before submitting. We judge each image individually but overall policy is: - No obtrusive censors (logos over parts of figures, black bars, mosaic, etc). Exception may be granted for: users living in a location where it is required by law (ex: Japan). - Obtrusive or excessive watermarks that make the image hard to see are discouraged. Watermarks are allowed, but if you put your watermark just over the genitals, for example, it will likely qualify as a violation. - Alternate versions or artistically censored works are allowed with discretion. This would include something like a bikini drawn onto the figure, as long as it doesn't look sloppy and out of place. Generally if the ‘censor’ makes sense within the context of the image it is not in violation. - Censoring via cropping is allowed if the end result is still well-composed and functions as its own image. - Visible advertising on images is sometimes acceptable. Commission price sheets will always be allowed. Ads for sales, streaming, YCH, etc, or patreon-locked images that will later be replaced by the full image are allowed as long as they don’t take up more than 50% of your main gallery. Time-sensitive advertisements can be removed or moved to scraps after they are no longer needed. - Advertising in descriptions and titles is always acceptable. Use the constructive critique section of the forums, if you need further help with rejection issues.

It's stated in the rules. And yeah, the moderator is not alone to think this censorship is not tasteful It's not a black box, it's a white box but you're totally filling what the rules say you mustn't do.

Here's the specific rule we're talking about:

Quote:

Advertising If your image is mostly an advertisement it will probably be rejected. This doesn't mean you can't advertise your site in your image, and you can certainly have a URL as your signature or something, but it has to be kept tasteful. Images that are badly censored for the purpose of trying to sell uncensored versions are also likely to be rejected -- at least do a tasteful job if you are going to censor it, not a black box. We realize artists want to make money, but you are better off focusing your advertising efforts in the picture's description rather than ruining the image.